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Year 1: Week 4, Day 1 Add 10s to 2-digit numbers

Each day covers one maths topic. It should take you about 1 hour or just a little more.

1. Start by reading through the Learning Reminders. They come from our PowerPoint slides.

2. Tackle the questions on the Practice Sheet.

There might be a choice of either Mild (easier) or Hot (harder)! Check the answers.

3. Finding it tricky? That’s OK… have a go with a

grown-up at A Bit Stuck?

4. Have I mastered the topic? A few questions to Check your understanding. Fold the page to hide the answers!

© Hamilton Trust

Learning Reminders

© Hamilton Trust

Learning Reminders

© Hamilton Trust

Learning Reminders

© Hamilton Trust

Practice Sheet MildAdding tens

Part A

The toy shop needs to increase all of its prices by 10p. Can you work out the new prices?

Part B

The toy shop needs to increase all of its prices by 20p. Can you work out the new prices?

39p

48p

11p

33p

26p

51p

32p17p

41p 43p

27p

23p

© Hamilton Trust

Practice Sheet HotAdding tens

Part A

The toy shop needs to increase all of its prices by 40p. Can you work out the new prices?

Part BThese toys have had a price increase too but the owner cannot work out how much.Boat

How much has the price increased?

36p

29p

58p

11p

47p

39p

TwistedHamilton Games

Hamilton Games

33p 53p

46p 86p

62p 92p

29p 79p13p

53p

Practice Sheets1-100 grid

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1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

91 92 93 94 95 96 97 98 99 100

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Practice Sheets Answers

Adding tens (mild)

39p + 10p = 49p 48p + 10p = 58p

51p + 10p = 61p26p + 10p = 36p

11p + 10p = 21p 33p + 10p = 43p

32p + 20p = 52p

41p + 20p = 61p

17p + 20p = 37p27p + 20p = 47p

43p + 20p = 63p

23p + 20p = 43p

Adding tens (hot)

Part A 36p + 40p = 76p

39p + 40p = 79p

29p + 40p = 69p

58p + 40p = 98p11p + 40p = 51p47p + 40p = 87p

TwistedHamilton Games

Hamilton Games

Part B

46p + 40p = 86p 62p + 30p = 92p29p + 50p = 79p

13p + 40p = 53p

Part A

Part B

Learning outcomes:

© Hamilton Trust

Work in pairs

Things you will need:• A 1-100 grid• A spider• Spider sums• A pencil

What to do:

• Choose a Spider sum.

• Place Spider on the first number in the sum.

• Use Spider to add 10. Write the answer in the sum.

• Repeat for as many sums as you can.

A Bit Stuck?Spider adds

S-t-r-e-t-c-h:Make up some of your own Spider sums.

• I can use Spider to add 10 to 2-digit numbers.

© Hamilton Trust

18 + 10 =

24 + 10 =

27 + 10 =

38 + 10 =

36 + 10 =

50 + 10 =

42 + 10 =

85 + 10 =

A Bit Stuck?Spider adds

© Hamilton Trust

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

91 92 93 94 95 96 97 98 99 100

A Bit Stuck?Spider adds

© Hamilton Trust

A Bit Stuck?Spider adds

© Hamilton Trust

A Bit Stuck?Spider adds

© Hamilton Trust

Check your understanding

Questions

Complete each sentence.

54 + 10 =

37 + = 47

42 + 20 =

+ 20 = 83

66 + = 96

Add 30 to each number:

53 24 18 46

Fold here to hide answers

Check your understanding Answers

Complete each sentence.

54 + 10 = 64 37 + 10 = 47

42 + 20 = 62 63 + 20 = 83

66 + 30 = 96 Some children may find the questions with the missing number on the left hand side (what has to be added to 37 to equal 47) trickier.

Add 30 to each number:

53 83 24 54 18 48 46 76